Motor driven switch



March 22, 1938. R. PUDELKO 2,112,044-

. MOTOR' DRIVEN SWITCH Filed OCT.. 18, 1934 v 20 Of the drawing: on the block i 2, but inasmuch as these are dupli- .Figure 1 is a, side elevation of a typical embodi.. cates, Vthey are not described in detail but are ment illustrative of the present invention, with Shown in the drawing. the cover and certain other parts being shown Motor means are provided fOr Operating the 'Z'r in section, and switching apparatus and for this purpose the 25 o Figure 2 is a front elevation of the embodiment magnet 2|) of a small Ferraris motor is mounted shown in Figure 1 with the cover removed. on the rear face of plate 9 and operates to rotate Patented Mar. 22, 1938 l UNITED STATES vPATENTOFFICE MOTOR DRIVEN SWITCH Riccard Pudelko, Zug, Switzerland, assignor to Landis & Gyr, A.G., a corporation ofV Switzerland Application October 18, 1934, Serial No. 748,825 In Switzerland October 25, 1933 3 Claims. (Cl. 20o- 153) The present invention relates to motor-driven 8 which support a plate 9 carrying the switchswitching apparatus, and more particularly to a operating motor, the switch contacts and the motor-driven switch particularly adapted for switch-operating caInS'- ASernbOdied, the Switch use in connection with electrically-heated boilers -crnprses a pair 0f @Ontaets l0 and Il, ccntact for heating systems. l0 being mounted on a block of insulating mate- 5 Objects and advantages of the invention will rial i2 Which iS piVOtally Suppcrted t0 the plate be set forth in part hereinafter and in part will 9 by means of pivot pin I3V passing through be obvious herefrom, or may be learned by practhe lower portion of the block, andv contact Ill tice with the invention, the same being realized extends rearwardly t0y form a threaded terminal 10 and attained by means of the instrumentalities I4 at the rear ofthe block. 10 and combinations pointed out in the appended Contact Il is resiliently and movably mounted claims. by a spring I5 secured to the block l2 by means The invention consists in the novel parts, con- Of Screw l5, the rear end 0f the Screw forming struction, arrangements, combinationsv and ima terminal i? at the rear 0f the block i2. The provements herein shown and described. Spring i5 is of a general U-Shape, and itS upper 15 The accompanying drawing, referred to herefree end is attached to a rigid strapV I8 carrying in and constituting a part hereof, illustrates one a cam rOllcr i9. embodiment of the invention, and together with When it iS desired t0 prOVde a tWO-pcle Switchl `the description, serve to explain the principles a duplicate Sct 0f contacts i0 and' may be of the invention. i mounted to one side of the first pair of contacts The present invention has for its object the motor discZl. Motor disc 2l is rotatably mounted provision of a novel and improved motor-driven by means 0f a Shaft 22 in a jeWeled bearing 23 switching apparatus, particularly adapted for the and a journal 24. Shaft 22 carries a pinion 25 30 contro1 of power supplied to heating systems. meshing with gear 26 which is mounted on shaft Another object of the present invention is the 2l to drive shaft 21 through a friction clutch 28 provision of a motor-driven switching apparatus and against the tenSiOn 0f Spring 29 which has adapted to carry out a normal switching cycle, one end 39 fixed to the shaft 2l about which and provided with means for interrupting or Spring 29 is coiled and its other end 3| xed to 35 modifying the normal action of the apparatus. a plate 0I bracket 32 fXed t0 the plate 9. An The present invention is particularly adapted abutment 33 iS mounted 0n the frame plate 9 for controlling the supply of electrical energy to and serves to limit rotation of the shaft 21 by electrically heated boilers where the power is cccperatiOn With St0p134- Shaft 27 iS pIOVided supplied during off-peak periods at low rates and with cams 36, correspOnding in number t0 the 40 the water so heated is distributed for the heating number of switch poles, and these cams cooperate of the house or other room as needed during the with the cam rollers I9 to open the switches day. In accordance with the present embodiagainst the pressure of the contact mounting ment of the invention, the power is controlled by springs l5.

means of a motor-driven switch controlled in Means are provided for manually effecting 45 accordance with a predetermined time cycle, and closure of the switches during the time they are optionally operable manual means are provided mechanically open, and for this purpose a rigid for opening the switch after it has been opened strap 40 extends upwardly from the block l2. by the motor and other optionally operable Strap 40 is provided with a bent end 4I comanual means for opening the closed contacts. operating with a latch member 42 mounted on a 50 Referring now in detail to the illustrative emspring t3 which extends forwardly from the bodiment of the invention, as shown in the acplate 9 and is secured thereto. This latch serves companying drawing, there is provided a base to hold the contact I0, the block I2 and the strap plate 5 to which a cover 6 is fastened by means of 40 in their normal position, as shown by the screws 1. On the base plate 5 are mounted posts dotted lines. For raising the spring 43 to release 55 the latch 42 and allow the block I2 to move placing contacts I and I I in contact with each other, a cam 45 is rotatably mounted immediately beneath the forward end of spring 43 by means of a shaft 46 carried in the cover 6 and connected to knob. 41. A spring 48 serves to return the cam 45 to its normal position after the fingers are released from knob 41, while a stop 49 mounted on the knob 41 cooperates with a stop pin 50 mounted on the cover to limit rotation of the knob 41.

Means are provided for restoring the contacts I and II to their normal position and for this purpose a cam 52 is mounted on shaft 21 between the cams 36, and is adapted to cooperate with the rigid strap 4I] to move it forwardly to an extent suflicient to latch it in its normal position. Thereafter, the contacts remain open until the cams 36 are moved to permit them to close.

Means are also provided for opening the contacts I G and I I after they have been closed by the operation of knobs 41, and for this purpose a cam 6D is mounted on a shaft 6I rotatable in the cover 6 and connected to knob 62. is returned to its normal position by means of spring 63, and is limited in its rotation by means of stops 64. A bar 65 is rigidly supported with respect to block I2 by means of a forwardly-extendingspark shield 66, and is adapted to cooperate With. cam 60 so that by rotation of cam 60, the block I2 is restored to its normal latched position, whereby contacts II are spaced from the cooperating contacts I0.

Stops 49 and 64 maybe apertured so that the apparatus may be sealed to prevent its use by unauthorized persons.

A suitable terminal chamber -69 is provided through which the connections may be made to the switch contacts ID and II as well as to the windings of theV motor magnet 20, and the supply oi power to the motor magnets may be controlled b-y means of a suitable time switch or otherwise as desired.

During the operation of the switching device, the contacts Ill and II are initially held out of contact With each other, but by rotation of the cams 36 caused by operation of the motor disc 2|, the springs I5 cause these contacts to be moved together to close the circuit. Stops 33 and 34 limit rotation or the shaft 21 against the tension of spring 29, but after the curr-ent supplied to the motor magnet 253 is discontinued, the spring 29 permits the cams 36 to return to their Cam (illl original position, at which time the contacts I 0 and I I are out of contact With each other.

When it is desired to close the heating circuit during a peak load period, it is only necessary for the customer to rotate the knob 41, thereby releasing the latch 42 and permitting the contacts to move into contact with each other. Thereafter, the contacts are restored to their normal latched position upon the next operation of the motor disc 2| or they may be previously restored 'by turning the handle 62.

The invention in its broader aspects is not limited to the specic mechanisms shown and described but departures may be made therefrom within the scope of the accompanying claims without departing from the principles of the invention and without sacricing its chief advantages.

What I claim is:-

1. A switching apparatus including in combination a pivotally mounted contact, a second contact mounted for movement with and with respect to the iirst contact, means for releasably holding the contacts in a predetermined relative position, a rotary cam to move said second contact, manualmeans for releasing the first contact, a cam to move said rst contact after manual release and manual means for moving said rst Contact in case the second cam means has not moved therst contact.

2. A switching apparatus including in combination a pivotally mounted contact, a second contact mounted formovement with and with respect to the first contact, a latch for holding said contacts against pivotal movement, a rotary cam to move said second contact, manual means for unlatching said rst contact, a cam to restore said contacts to latched position, and manual means for alternatively restoring said contacts.

3. A switching apparatus including in combination a pivotally mounted contact, a second contact mounted for movement with respect to the rst contact, a latch for holding said contact against pivotal movement, a rotary cam to space said contacts by movement of the second contact, manual means for unlatching said first contact to close said contacts, a cam to restore said cone tacts to latched position after they are closed by the other manual means and manual means for restoring said contacts to open position prior to closure by said cam.

RICCARD PUDELKO. 

